Factor of seasonal efficiency for various types of thermal pumps

As it is known COP (factor of transformation) thermal pump is inversely proportional to a temperature difference a boundary a source of low-potential heat and in temperature of the heat-carrier of heating submitted to system.

The most effective system of heating used with the thermal pump – teply pol system. The heat-carrier temperature for it does not exceed 35 ° Page. This parameter for a heating season is constant unlike size of temperature of a low-potential source of heat. The thermal pumps using external air as a source of heat are most subject to this influence. However the thermal pumps using and other power sources are exposed to insignificant influence. Factor of seasonal efficiency for various types of thermal pumps The thermal pump with teply pol system Usually, in the technical specification on model of the thermal pump of any producer RUBBISH is specified for concrete sizes of temperature of a nizkopotentsialny source of heat and heat-carrier temperature. For thermal pumps of the air-water type a number of values of temperature of external air (-15 ° by C,-7 ° C, 2 ° C, 7 ° C, 10 ° C, 20 ° C) is given. For air temperature 2 ° the RUBBISH makes the C factor about 3,5, for lower air temperatures (-7 °) the RUBBISH will be from 2 to 2,5 depending on concrete model of the thermal pump and a configuration of system of heating. As in various climatic zones average air temperature is various, for more detailed calculation the parameter called by factor of seasonal efficiency of the thermal pump (HSPF) is entered. In practice this factor can be received by a way of the corresponding measurements. However this factor can and be calculated at design of heatpump system. For this purpose use average climatic these installation sites of the thermal pump and as count quantity of energy necessary for a concrete building for the chosen period. The factor of seasonal efficiency of the thermal pump for various types of systems For thermal pumps air-water, for our climatic zone, factor of seasonal efficiency will be equal 3-3,5. Soil thermal pumps (brine water) "are less sensitive" to climatic fluctuations. Thermal pumps with a vertical probe (skvazhinny type) are almost tolerant to these phenomena. Unlike thermal pumps with a horizontal collector, for such systems factor the RUBBISH at the beginning of the heating period will be higher at the expense of a progretost of the top layer of earth during the summer period. In the second half of a heating season the temperature of soil decreases on some degrees. Thermal pumps of skvazhinny type are subject to this phenomenon also. The soil temperature round a well slightly decreases for the heating period and is not in time will get warm to the following heating season. It leads to deterioration RUBBISH and factor of seasonal efficiency of the thermal pump and as can lead to soil degradation in this place. Therefore a number of the European researchers having a wide experience in studying of thermal pumps, recommend to turn on in the flight period the thermal pump in a reversny mode, thereby maintaining temperature some soil. This process is called as process of thermal stabilization. Value of factor of seasonal efficiency for soil thermal pumps lies in side-altars from 3,5 to 4,3. For thermal pumps using water as a low-potential source of heat the factor of seasonal efficiency reaches values 4,5-5.

Updated: August 24, 2015 — 12:42 pm